While looking for refs, I first saw this and thought "aw, cute li'l guys, aren't they?" I then later stumbled upon THIS and was like "JESUS CHRIST, HOW HORRIFYING". I decided to go for a creepy angle, which is funny because these things are totally harmless and hardly longer than a foot. Not sure how well I did with this one but... enjoy?

The Velvet Belly is a type of deep sea dogfish and, like other lantern sharks, is bio-luminescent. It has light-emitting photophores that form a species-specific pattern over its flanks and abdomen that are thought to function in counter-illumination, which camouflages the shark against predators.

This is really cool. And I looked at the picture links you had posted. The first one I thought was cute but the second one scared me. Even thought I was looking through my fingers. It was creepy.....O_O